feat(sync): full code sync from release

backend/internal/service/sora_gateway_service_test.go

@@ -179,6 +179,31 @@ func TestSoraGatewayService_ForwardStoryboardPrompt(t *testing.T) {
 	require.True(t, client.storyboard)
 }
 
+func TestSoraGatewayService_ForwardVideoCount(t *testing.T) {
+	client := &stubSoraClientForPoll{
+		videoStatus: &SoraVideoTaskStatus{
+			Status: "completed",
+			URLs:   []string{"https://example.com/v.mp4"},
+		},
+	}
+	cfg := &config.Config{
+		Sora: config.SoraConfig{
+			Client: config.SoraClientConfig{
+				PollIntervalSeconds: 1,
+				MaxPollAttempts:     1,
+			},
+		},
+	}
+	svc := NewSoraGatewayService(client, nil, nil, cfg)
+	account := &Account{ID: 1, Platform: PlatformSora, Status: StatusActive}
+	body := []byte(`{"model":"sora2-landscape-10s","messages":[{"role":"user","content":"cat running"}],"video_count":3,"stream":false}`)
+
+	result, err := svc.Forward(context.Background(), nil, account, body, false)
+	require.NoError(t, err)
+	require.NotNil(t, result)
+	require.Equal(t, 3, client.videoReq.VideoCount)
+}
+
 func TestSoraGatewayService_ForwardCharacterOnly(t *testing.T) {
 	client := &stubSoraClientForPoll{}
 	cfg := &config.Config{
@@ -524,3 +549,10 @@ func TestParseSoraWatermarkOptions_NumericBool(t *testing.T) {
 	require.True(t, opts.Enabled)
 	require.False(t, opts.FallbackOnFailure)
 }
+
+func TestParseSoraVideoCount(t *testing.T) {
+	require.Equal(t, 1, parseSoraVideoCount(nil))
+	require.Equal(t, 2, parseSoraVideoCount(map[string]any{"video_count": float64(2)}))
+	require.Equal(t, 3, parseSoraVideoCount(map[string]any{"videos": "5"}))
+	require.Equal(t, 1, parseSoraVideoCount(map[string]any{"n_variants": 0}))
+}